Rhyolite - fine grained, exrusive, quick cooling rate, felsic Scorria - fine grained texture, extrusive, quick cooling rate, mafic, looks like pumice but doesnt float. Granite - coarse texture, felsic, slow cooling rate, intrusive, bathroom pass is made out of this. Andesite - fine grained, extrusive, quick cooling rate, mafic, Diorite - coarse grained, intrusive, slow cooling rate, felsic, looks like an oreo milkshake. Basalt - fine grained, extrusive quick cooling rate, mafic, black and tan speckles. Pumice - fine grained, extrusive, quick cooling rate, felsic, floats in water, bubbles Gabbro - porphyritic, slow and fast cooling rate, intrusive and extrusive, mafic Obsidian - Glassy and black, extrusive, quick cooling rate, felsic.
Sedimentary Rocks
Conglomerate- clastic, poorly sorted, looks like coquina but less seashelly Coal- organic, black Limestone- geodes, chemical Brecchia- poorly sorted, clastic, grey Shale- fossils stratefication, well sorted clastic Chert- scratches limestone, stratefication, well sorted, clastic Sandstone- stratification, well sorted, clastic, looks like a desert, ripple lines. Coquina- look like a bunch of seashells glued together. Siltstone- stratification, reacts with acid, well sorted, clastic
Metamorphic Rocks
Quartzite- formed by heat, rock of quartz, non foliated Marble- formed by heat, used to be calcite, non foliated Schist- formed by pressure, used to be chlorite Gneiss- formed by heat and pressure, used to be muscovite, foliated Slate- made by pressure, comes from shale, foliated.
Rhyolite - fine grained, exrusive, quick cooling rate, felsic
Scorria - fine grained texture, extrusive, quick cooling rate, mafic, looks like pumice but doesnt float.
Granite - coarse texture, felsic, slow cooling rate, intrusive, bathroom pass is made out of this.
Andesite - fine grained, extrusive, quick cooling rate, mafic,
Diorite - coarse grained, intrusive, slow cooling rate, felsic, looks like an oreo milkshake.
Basalt - fine grained, extrusive quick cooling rate, mafic, black and tan speckles.
Pumice - fine grained, extrusive, quick cooling rate, felsic, floats in water, bubbles
Gabbro - porphyritic, slow and fast cooling rate, intrusive and extrusive, mafic
Obsidian - Glassy and black, extrusive, quick cooling rate, felsic.
Sedimentary Rocks
Conglomerate- clastic, poorly sorted, looks like coquina but less seashelly
Coal- organic, black
Limestone- geodes, chemical
Brecchia- poorly sorted, clastic, grey
Shale- fossils stratefication, well sorted clastic
Chert- scratches limestone, stratefication, well sorted, clastic
Sandstone- stratification, well sorted, clastic, looks like a desert, ripple lines.
Coquina- look like a bunch of seashells glued together.
Siltstone- stratification, reacts with acid, well sorted, clastic
Metamorphic Rocks
Quartzite- formed by heat, rock of quartz, non foliated
Marble - formed by heat, used to be calcite, non foliated
Schist- formed by pressure, used to be chlorite
Gneiss- formed by heat and pressure, used to be muscovite, foliated
Slate- made by pressure, comes from shale, foliated.